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Finding the Fourth Proportional to 12,339.84, 17,031.74 and 8,516.85

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Solution

The fourth proportional to 12,339.84, 17,031.74 and 8,516.85 is: 11,755.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.84 : 17,031.74 = 8,516.85 : x
  2. Step 2: Convert to fraction form
    12,339.84/17,031.74 = 8,516.85/x
  3. Step 3: Cross multiply
    12,339.84x = 17,031.74 × 8,516.85
  4. Step 4: Simplify right side
    12,339.84x = 145,056,668.37
  5. Step 5: Solve for x
    x = 145,056,668.37/12,339.84
  6. Step 6: Final answer
    x = 11,755.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.